Curt, I don’t think you understood what I meant. Calibration is one thing, setting the BFO is another. what I mean, when you do.calibration, you look for the zero beat.Then you validate and have to re

Re, there may be things to dig around here in manager cdt

Hello, I don’t know if anyone has ever put an oscilloscope on the BF part of the audio amplifier. Example connect to hp output with sufficient level. I notice that the calibragre gives a pure signal o

Evan, I did the test on TX and RX of the Nextion with the decoupling as done on the rotary encoder. No luck at all. After, in my case, I can really afford to make a power supply completely isolated fr

Hello, i have found this video for Smeter adjustment https://www.youtube.com/watch?v=JOyOAcvnq_8 cdt

Evan, Bob, Meanwhile, I think I finally found what I was looking for to replace the rotary encodeur , with an UP DOWN encoder with 2 buttons + ADD a 3rd to validate. It seems cool to me, instead of ge

Evan, Bob, Test made with an other power without earth connexion. it's the same. Click when digit change. last test to do, pull resistor and diviser with capacitors on line TX, RX. cdt

Evan ,Bob, Evan, I checked the earth ground of the oscilloscope, it’s well grounded. For the power outlets, both are on the same connection. I checked my home made power supply I built. I see actually

Evan, When I reflected on all this, I told myself that something is not clear between the - Power, the mass chassis and ground of the sector. I don’t think it’s normal for me to see the noise with osc

Evan, A little bit of reading.. https://electronics.stackexchange.com/questions/140761/arduino-how-do-i-reduce-the-noise-in-my-circuit https://forum.arduino.cc/index.php?topic=155220.0 http://www.mass

Evan, Here that i have made for the rotary encoder for rotation noise solution was here at he end of page. LOL http://ubitx.net/category/hardware/encoder/ cdt

see the end of this topic https://groups.io/g/BITX20/topic/77426301?p=,,,20,0,0,0::recentpostdate,,,20,2,20,0&allview=1 I had one amplifier I have big sound now cdt

#v5

Evan, Results of the tests: The noise remains even after disconnecting the connection and its cables of nextion Noise still exists, but less loud if I remove the module SI5153 (For me the continuous p

I forgot to tell you, but I kept the same kind of connection, but obviously I changed the copper tracks accordingly. So the picture can be misleading. It’s a 5V just for the Nextion. cdt

Evan The electrical connection for Nextion is powered by a separate regulator and only for it. (An other addon) see red circle on picture We don’t see the PCB other side, but there’s also the resistor

Evan, My Si5351 generator is a plug-in module. See exemple Maybe the resistor are on it? the module diagram should be. If someone have it. To check, in any case it would cost not to add the 2 resistor

hello, All electronic schemas are welcome cdt

Jack, I put the diagrams of my house Ubitx You can then see this story of resistor. cdt

On Sat, Oct 24, 2020 at 06:34 PM, Jack, W8TEE wrote: No, I was just working on a project that used the clock and data line (A4 and A5) for the interface to the Nano. If the schematic you're using has

Already I see shielded wires on the connections and a lot of ferrite